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100 lines
3.5 KiB
100 lines
3.5 KiB
package metrics |
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import ( |
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"fmt" |
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"io" |
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"sort" |
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"time" |
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) |
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// Write sorts writes each metric in the given registry periodically to the |
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// given io.Writer. |
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func Write(r Registry, d time.Duration, w io.Writer) { |
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for _ = range time.Tick(d) { |
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WriteOnce(r, w) |
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} |
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} |
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// WriteOnce sorts and writes metrics in the given registry to the given |
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// io.Writer. |
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func WriteOnce(r Registry, w io.Writer) { |
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var namedMetrics namedMetricSlice |
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r.Each(func(name string, i interface{}) { |
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namedMetrics = append(namedMetrics, namedMetric{name, i}) |
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}) |
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sort.Sort(namedMetrics) |
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for _, namedMetric := range namedMetrics { |
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switch metric := namedMetric.m.(type) { |
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case Counter: |
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fmt.Fprintf(w, "counter %s\n", namedMetric.name) |
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fmt.Fprintf(w, " count: %9d\n", metric.Count()) |
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case Gauge: |
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fmt.Fprintf(w, "gauge %s\n", namedMetric.name) |
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fmt.Fprintf(w, " value: %9d\n", metric.Value()) |
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case GaugeFloat64: |
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fmt.Fprintf(w, "gauge %s\n", namedMetric.name) |
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fmt.Fprintf(w, " value: %f\n", metric.Value()) |
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case Healthcheck: |
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metric.Check() |
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fmt.Fprintf(w, "healthcheck %s\n", namedMetric.name) |
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fmt.Fprintf(w, " error: %v\n", metric.Error()) |
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case Histogram: |
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h := metric.Snapshot() |
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ps := h.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999}) |
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fmt.Fprintf(w, "histogram %s\n", namedMetric.name) |
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fmt.Fprintf(w, " count: %9d\n", h.Count()) |
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fmt.Fprintf(w, " min: %9d\n", h.Min()) |
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fmt.Fprintf(w, " max: %9d\n", h.Max()) |
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fmt.Fprintf(w, " mean: %12.2f\n", h.Mean()) |
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fmt.Fprintf(w, " stddev: %12.2f\n", h.StdDev()) |
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fmt.Fprintf(w, " median: %12.2f\n", ps[0]) |
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fmt.Fprintf(w, " 75%%: %12.2f\n", ps[1]) |
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fmt.Fprintf(w, " 95%%: %12.2f\n", ps[2]) |
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fmt.Fprintf(w, " 99%%: %12.2f\n", ps[3]) |
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fmt.Fprintf(w, " 99.9%%: %12.2f\n", ps[4]) |
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case Meter: |
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m := metric.Snapshot() |
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fmt.Fprintf(w, "meter %s\n", namedMetric.name) |
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fmt.Fprintf(w, " count: %9d\n", m.Count()) |
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fmt.Fprintf(w, " 1-min rate: %12.2f\n", m.Rate1()) |
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fmt.Fprintf(w, " 5-min rate: %12.2f\n", m.Rate5()) |
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fmt.Fprintf(w, " 15-min rate: %12.2f\n", m.Rate15()) |
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fmt.Fprintf(w, " mean rate: %12.2f\n", m.RateMean()) |
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case Timer: |
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t := metric.Snapshot() |
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ps := t.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999}) |
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fmt.Fprintf(w, "timer %s\n", namedMetric.name) |
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fmt.Fprintf(w, " count: %9d\n", t.Count()) |
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fmt.Fprintf(w, " min: %9d\n", t.Min()) |
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fmt.Fprintf(w, " max: %9d\n", t.Max()) |
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fmt.Fprintf(w, " mean: %12.2f\n", t.Mean()) |
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fmt.Fprintf(w, " stddev: %12.2f\n", t.StdDev()) |
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fmt.Fprintf(w, " median: %12.2f\n", ps[0]) |
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fmt.Fprintf(w, " 75%%: %12.2f\n", ps[1]) |
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fmt.Fprintf(w, " 95%%: %12.2f\n", ps[2]) |
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fmt.Fprintf(w, " 99%%: %12.2f\n", ps[3]) |
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fmt.Fprintf(w, " 99.9%%: %12.2f\n", ps[4]) |
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fmt.Fprintf(w, " 1-min rate: %12.2f\n", t.Rate1()) |
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fmt.Fprintf(w, " 5-min rate: %12.2f\n", t.Rate5()) |
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fmt.Fprintf(w, " 15-min rate: %12.2f\n", t.Rate15()) |
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fmt.Fprintf(w, " mean rate: %12.2f\n", t.RateMean()) |
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} |
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} |
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} |
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type namedMetric struct { |
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name string |
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m interface{} |
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} |
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// namedMetricSlice is a slice of namedMetrics that implements sort.Interface. |
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type namedMetricSlice []namedMetric |
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func (nms namedMetricSlice) Len() int { return len(nms) } |
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func (nms namedMetricSlice) Swap(i, j int) { nms[i], nms[j] = nms[j], nms[i] } |
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func (nms namedMetricSlice) Less(i, j int) bool { |
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return nms[i].name < nms[j].name |
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}
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